Gefen's 4x2 HDMI Switcher routes high definition video in multiple resolutions up to 1080p plus multichannel digital audio from any of four sources. four inputs accommodate the simultaneous connection of up to four high definition video sources, such as satellite systems and HD DVD players. Two outputs send the high definition audio/video signals up to two high definition displays. A digital audio output port is available if you need to direct the audio to an audio receiver. Switching is done via the IR remote that is provided with the unit.